Field measurement of the organic peroxy radicals by the low-pressure reactor plus laser-induced fluorescence spectroscopy  

作　　者：Shule Li Keding Lu Xuefei Ma Xinping Yang Shiyi Chen Yuanhang Zhang 

机构地区：[1]State Key Joint Laboratory of Environmental Simulation and Pollution Control,College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China

出　　处：《Chinese Chemical Letters》2020年第10期2799-2802,共4页中国化学快报（英文版）

基　　金：the National Key R&D Program of China(No.2017YFC0209402);the Beijing Natural Science Foundation,China(No.JQ19031)。

摘　　要：A low-pressure reactor(LPR) was developed for the measurement of ambient organic peroxy(RO2)radicals with the use of the laser-induced fluorescence(LIF) instrument.The reactor converts all the RO_(x)(=RO2+HO2+RO+OH) radicals into HO2 radicals.It can conduct different measurement modes through altering the reagent gases,achieving the speciated measurement of RO2 and RO2^#(RO2 radicals derived from the long-chain alkane,alkene and aromatic hydrocarbon).An example of field measurement results was given,with a maximum concentration of 1.88 × 10^(8) molecule/cm^(3) for RO2 and 1.18×10^(8) molecule/cm^(3) for RO2^(#).Also,this instrument quantifies the local ozone production rates directly,which can help to deduce the regional ozone control strategy from an experimental perspective.The new device can se rve as a potent tool for both the explo ration of frontier chemistry and the diagnosis of the control strategies.

关 键 词：Organic peroxy radicals Flow tube reactor LIF RO_(2)measurement Field observation Ozone production rate 

分 类 号：O657.3[理学—分析化学] X13[理学—化学]